package com.hxb.example.exception;
 
import com.hxb.example.resp.ApiResponse;
import lombok.extern.slf4j.Slf4j;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.bind.support.WebExchangeBindException;
import reactor.core.publisher.Mono;
 
import java.util.List;
 
@Slf4j
@RestControllerAdvice
public class GlobalExceptionHandler {
    /**
     * 参数验证异常
     *
     * @param ex
     * @return
     */
    @ExceptionHandler(WebExchangeBindException.class)
    public Mono<ApiResponse> handleWebExchangeBindException(WebExchangeBindException ex) {
        log.info("参数验证异常:" + ex);
        // 处理绑定异常
        BindingResult result = ex.getBindingResult();
        List<FieldError> fieldErrors = result.getFieldErrors();
        return Mono.just(ApiResponse.fail(fieldErrors.get(0).getDefaultMessage()));
    }
 
    /**
     * 数学计算异常
     *
     * @param ex
     * @return
     */
    @ExceptionHandler(ArithmeticException.class)
    public Mono<ApiResponse> handleArithmeticException(ArithmeticException ex) {
        log.info("数学计算异常:" + ex);
        return Mono.just(ApiResponse.fail(""));
    }
 
    /**
     * 兜底异常
     *
     * @param ex
     * @return
     */
    @ExceptionHandler(Exception.class)
    public Mono<ApiResponse> handleMyException(Exception ex) {
        log.info("系统异常：" + ex);
        return Mono.just(ApiResponse.fail(ex.getMessage()));
    }
}